(b) The corporate organization shall be divided into five regional systems, as follows: (1) The Oahu regional health care system, which may include the state veterans home on Maui;(2) The Kauai regional health care system;(3) The Maui regional health care system;(4) The east Hawaii regional health care system, comprising the Puna district, north Hilo district, south Hilo district, Hamakua district, and Kau district; and(5) The west Hawaii regional health care system, comprising the north Kohala district, south Kohala district, north Kona district, and south Kona district; and shall be identified as regional systems I, II, III, IV, and V, respectively.